Machine for roughing shoe parts



May 19, 1936. c. G. BRosTRoM 2,040,329

MACHINE FOR ROUGHING SIIOE PARTS I Filed Oct. 30, 1 933 2 Sheets-Sheet 1^f A. .om

/NvE/VTUR @mam Q i ,-I-- IVL--- N l Why 19, 1936. C, Gf BROSTRQM2,040,829

MACHINE FOR ROUGHING SHOE PARTS Filed oct. 30, 1935 2 sheets-Sheetzivm-Aga mg Ew.- m

Patented May 19, 1936 UNITED STATES MACHINE FOR ROUGHING SHOE PARTSCharles G. Brostrom, Lynn, Mass., assignor to United Shoe MachineryCorporation, Paterson,

N. J., a corporation of New Jersey Application October 30,

9 Claims.

This invention relates to roughing machines and particularly to machinesfor roughing shoe parts such, for example, as the overlasted margin ofthe upper of a lasted shoe, to prepare the surfaces of such parts forthe reception of the cement which, in certain methods of shoemaking, isemployed for attaching other shoe parts, as outsoles, thereto.

In roughing the overlasted portion of the upper of a lasted shoe di'iculty is sometimes encountered in operating uniformly and to just theright degree upon the delicate upper leather, by reason of the irregularshape of the surface to be operated upon and the fact that, particularlyin the shank portion of the shoe, a concavely curved surface ispresented which requires the exercise of considerable skill by theoperator who attempts to perform the roughing operation with thecommonly used rotating wire brush.

vide an improved roughing machine which will so facilitate the roughingoperation that the average operator will be easily able to produceuniformly good work with less necessity for the exercise of skill thanhas heretofore existed when using the machines which have beenavailable.

This object is accomplished by the provision of a novel roughing toolwhich, in the illustrated embodiment of the invention, comprises a largenumber of wire bristles arranged in diagonally flaring relation to theaxis of rotation of the tool and supported in a tool head of suchconfiguration that a shoe of any size or shape may be easily andaccurately presented to and moved lpast the tool. The organization anddisposition of the tool are also such that the visibility of the portionof the Work which is being operated upon is enhanced, making it easy forthe operator to observe closely how the operation is proceeding, 40. andconsequently facilitating the production of an accurately outlineduniformly roughed area upon the surface of the work.

Another important improvement effected by the present invention consistsin tremendously Vincreasing the life of the roughing tool. The wirebrushes heretofore used have had a comparatively short life, it havingbeen found necessary to discard them when only a small proportion of thelength of the bristles had been worn away, because by that time many ofthe bristles had become bent and the degree of resiliency of thoseremaining had become so altered by the reduction in their length asseriously to affect the manner in which they operated upon the leather.A tool constructed in accordance with the present in- It is an object ofthe present invention to pro- 1933, serial No. 695,796

(cl. esa- 1)- vention will actually outlast a large number of thevvirebrushes of the older type Vand will have substantially uniform operatingcharacteristics throughout its entire life. This very desirableimprovement is secured in the illustrated roughing tool by the use, asbristles, of very long crimped wires arranged in a plurality of bundlesmainlyfclisposed parallel to the axis of rotation of the tool butVhaving their outer ends deflected and held outwardly at a considerableangle thereto. Y

Thevrear ends of the bundles of wires are preferably secured in anaxially movable ring which may be readily adjusted longitudinally of thetool-carrying shaft so that as the working ends of the wires graduallywear away they may be fed forward with the result that any desiredamount of projection of the wires from the surface of the tool head maybe maintained until the Wires are practically used up. By grouping theWire bristles in bundles into which the wires may be tied in separatecollections or groups, insurance is provided against the Wires becomingentangled with each other and the surface of the Work being operatedupon can be easily seen while the tool is rotating rapidly, which wouldnot be the case if a solid mass of wires were employed.

By employing crimped wires the springiness of the bristles is materiallyimproved and this, together with the provision for easily and quicklyadjusting the amount by which the bristles project from the vtool headmakes it possible to adjust the feel and effective stiffness of the toolto secure the best results 4with the many different kinds of leatherswhich are used in making the uppers of shoes.

'I'hese and other objects and features of the invention will be betterunderstood and appreciated from reading the following detaileddescription of one embodiment thereof in connection with theaccompanying drawings, in which- Fig. 1 is a view in front elevation,partly in section, of a shoe upper roughing machine embodying theinvention;

Fig, 2 is a view illustrating the relation of the roughing tool to theWork as seen by the operator;

Fig. 3 isV a view in elevation, partly in section,V

of the roughing tool head with the parts thereof somewhat separated;

Fig. 4 is a perspective view of the principal parts of the roughing toolhead; and

Fig. 5 is a view showing a detail of one of the bundles of wirebristles.

In the drawings, I indicates a supporting co1- umn upon which is bolteda base I 2 provided with bearings |4, 6 for a rotating shaft |8 whichmay out'most of its length, consisting practically of a tube having onesolid end, as shown at 28 in Fig. 1. A long screw 30 is arranged to turnfreely in an axial hole which passes through the solid end 28 of theshaft I8, and secured to the lefthand end of said screw, as seen in Fig.1, is a knurled head 32 by means of which the screw may be easily turnedrelatively to the shaft I8.

ThreadedV upon the screw 30 is an adjusting ring 34 which islongitudinally slidable in the hollow bore of the shaft I8 and isprevented from turning relatively thereto by a spline 36. This adjustingring 34 is provided with eyes through which are passed the groupsV ofwires constituting the bristles of the roughing tool. Fig. 5 shows oneof these groups of wires as it appears after it hasfbeen passed throughone of the Yeyes in the ring 34 and bent back upon itself to form acompact bundle 31V of wire bristles. Each such bundle is tied atintervals as indicated at 38 in Fig.l l in order to keep it separatefrom the other bundles of bristles and thus to prevent the large numberof Vwires'in the hollow shaft I8 from interfering or becoming entangledwith each other.

Initially the bundles of wires 36 are long enough to reach from theadjusting ring 34 when theV latter is at the left-hand end of its travelupon the screw 30, as seen in Fig. 1, to and substantially beyond theopen right-hand end of the Y shaft. The right-hand end of the shaft |8carries the roughing tool head` which will now be described in detail.

Referring particularlyto Figs. l, 3 and 4, 40 indicates acylindricalperipheral surface at the right-hand end of the shaft I8 intowhich is set a key 42. A bristle-guiding member 44 has an internalcylindrical surface which is a sliding t upon the surface 40 of theshaft and a key-way 48 arranged to engage the key 42 so that the guidemember 44 can be pushed upon the end of the shaft |8 but cannot turnrelatively thereto. An internal shoulder 50 engages the end 52 of theshaft and limits the extent to which the member 34 can be pushedthereon. Y

A sleeve 54, which surrounds the shaft and has Van internal shoulder 56engaging a shoulder 5,8

upon the shaft, may be screwed upon the externally threaded portion 60of the member 44 to draw the latter accurately and rmly against the endof the shaft. The guide member 44 is provided with a plurality ofoutwardly, directed openings 62, 64 designed to receive the respectivebundles of wire bristles 3T. These openings ilare outwardly from theaxis of the shaft, the alternate openings 62 making a greater angle withthe'said axis than the intermediate openings 64 so that the openings arestaggered relatively to each other, considered circumferentially of thebristle-guiding member 44.

Cylindrical surfaces 66V and 68 are formed upon the guide `member 44which .also has a screw threadedextension I0V pierced with an axial hole12- which receives the reduced pilot 14 upon the end of the screw 30 forthe purpose of'supporting the screw in thedaxis of the shaft I8.

A bristle-clamping ring '|76 is arranged to fit upon the cylindricalsurfaces 66, 68 of the member 44 and is secured to said "member byscrews upon theclamping plate 92.

'I8 passing through holes 80 in the ring andV screwed into threadedopenings 82 in the ,member 44. The ring 16 has bristle-,receivingopenings 84, 86 in register, respectively, with the openings 62, 64 inthe-member 60, the openings in the ring being formed as slots orchannels which receive corresponding clamping blocks 88, 90 formed upona bristle-clamping plate 92 provided with a central opening 94large'enough to slide over the extension 'l0 of the member 44. l0

A nut 96 is adapted to be screwed upon the end of the threaded extension10 to bear against the clampingrplate 92 and causethe blocks 88, 90 toVbe pressed tightly against the bundles of wire bristles 36. Theabove-described bristle-guiding lo member 44, clamping ,ring 'I6 andclamping plate 92, may be said to constitute a frusta-conicalbristle-holding tool head 'and are clearly shown in their assembledrelation in Fig. 1.

The bundles of wire bristles 3l may be properly 20 assembled with theadjusting ring 34, theV said ring started upon the screw 32 and, byturning the screw, drawn into the hollow shaft I8. The bristle-guidingmember 44 with the clamping` ring i6 secured to it is then mounted uponthe end 25 ci" the shaft, Vthe individual bundles of wire brisillesbeing directed outwardly through the respective openings in the member44 and the clamping ring and the clamping plate 92 placedin position.kThe nut 36 is not drawn up tightly until the bristles have beenadjusted to project the desired' Lamount from the periphery of theroughing tool head, which adjustment may easily be accomplished byturning the screw 30. The nut 96 is then tightened and the bristles areseurely held in adjusted position by the blocks V80, 90V

Whenever it isdesired to change theV adjustment of the bristles,Y it isonly necessary to loosen the nut 96, Vadjust the 40- bristles by meansof the screw 30 and adjusting ring 34 and; again tighten the nut 96.

Secured in brackets 98, |00 rising from the bearings |24, |6 is a rigidbar |02 which supports a tubular shield |04 for protecting theknurled'45.

head 32 of the screw 30 when the shaft is running.

The shield |04 is at the outer end of an arm |06 carried by a hub |08which is slidably mounted` upon the bar |02, a spring IIO beinginterposed between the bracket 98 and the hub |08 and tend- 5e vided tosecure the hub |08 to the bar |02Y when 55?! desired. When access to thehead 32 of the screw 30 is required for the purpose of makingadjustments the shield |04 is moved toward thelright and when releasedit automatically returns tothe position shown.

A dust-removing hood I I4 and a bristle-sharp-Vv ening apparatus ||6 areprovided, but these are fully described in United States Letters PatentNo. 1,989,078 granted upon my copending application Serial No. 594,529,filed February 23, 19312, 65 and need notbe describedV in detail here.

Having described my invention, what I-claim as new and desire to secureby Letters Patent of the UnitedStates is:

1. A rotary roughing brush having long bristles mainly disposed parallelto the rotational axis of the brush and having their work engaging endportions turned outward from said axis, and means for adjusting saidbristles lengthwise of the brush.

2. A rotary roughing tool having a tool head, bristles of crimped,resilient wire adjustably clamped in said head, and means for moving thebristles through the head, to vary the effective stiiness of thebristles to adapt them to work of diiferent kinds.

3. A rotary roughing brush having a brush head, bristles arranged in aplurality of separate bundles with the ends of said bundles projectingin staggered relation around the brush head, and means forsimultaneously varying the amount of projection oi all of said bundlesof bristles from the brush head.

4. A rotary roughing brush having long bristles mainly disposed parallelto the rotational axis of the brush, a brush head in which the Workengaging end portions of the bristles are held turned outward from saidaxis, and an axially adjustable ring in which the inner ends of thebristles are secured.

5. A rotary roughing tool for shoe parts comprising a tool head havingguide openings therein, a plurality of bundles of crimped Wire the workengaging end portions of which are longitudinally adjustable throughsaid guide openings, and an axially adjustable ring in which the otherends of said bundles of wire are secured.

6. A rotary roughing tool for shoe parts comprising a hollow shaft, afrusto-conical head having a plurality of outwardly diverging guideopenings therein, a corresponding plurality of bundles of wire bristlesdisposed in parallel relation within the shaft and having their Workengaging end portions directed outward through said guide openings, anaxially adjustable ring in which the other ends of the wire bristles aresecured, means for moving the ring to adjust the bristles through theguide openings, and a clamping device to secure the bundles 0I bristlesin adjusted position in the guide openings.

7. A rotary roughing tool for shoe parts oomprising a tubular shaft, anaxially disposed adjusting v-screw in the shaft, an adjusting ringthreaded upon said screw, bristles disposed in the shaft parallel to itsaxis and having their inner ends secured in said ring, a tool headsecured to the end of the shaft and having outwardly diverging channelsin which the portions df the bristles near their outer ends arearranged, and a clamping plate provided with blocks arranged to bearupon the bristles in the channels and clamp them in position therein.

8. A rotary roughing brush having a hollow, tubular housing, a toolhead, and long bristles mainly disposed in said housing parallel to thero-tational axis of the brush, the work engaging end portions of thebristles diverging outward from said axis and being held in divergentrela.- tion in said head.

9. A rotary roughing brush having a hollow, tubular housing, a toolhead, long bristles mainly disposed in said housing parallel to therotational axis of the brush, the work engaging end portions of thebristles being held in said head in divergent relation, and means foradjusting the bristles lengthwise in said housing and through said head.

CHARLES G. BROSTROM.

